/*
 * RED5 Open Source Media Server - https://github.com/Red5/ Copyright 2006-2016 by respective authors (see below). All rights reserved. Licensed under the Apache License, Version
 * 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless
 * required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and limitations under the License.
 */

package zx.zxlive.core.server.service;

import zx.zxlive.core.server.api.scope.IScope;
import zx.zxlive.core.server.api.scope.IScopeHandler;
import zx.zxlive.core.server.api.service.IServiceHandlerProvider;
import zx.zxlive.core.server.api.service.IServiceHandlerProviderAware;
import org.springframework.stereotype.Component;

/**
 * Allow scope handlers to create service handlers dynamically.
 *
 * @author The zSharpe Project
 * @author Vic Wang (xiaoyu860912@163.com)
 */
@Component
public class HandlerServiceResolver implements IServiceResolver {

    /** {@inheritDoc} */
    public Object resolveService(IScope scope, String serviceName) {
        IScopeHandler handler = scope.getHandler();
        if (handler instanceof IServiceHandlerProvider) {
            // TODO: deprecate this?
            Object result = ((IServiceHandlerProvider) handler).getServiceHandler(serviceName);
            if (result != null) {
                return result;
            }
        }
        if (handler instanceof IServiceHandlerProviderAware) {
            IServiceHandlerProvider shp = ((IServiceHandlerProviderAware) handler).getServiceHandlerProvider();
            if (shp != null) {
                return shp.getServiceHandler(serviceName);
            }
        }
        return null;
    }

}
